Which particular factors that earlier may have been somewhat weak in bringing about national health insurance later led to the passage of medicare and medicaid?

The growing elderly population, which was a politically active force in the middle-class.

Medicare and Medicaid did not plan on how the majority of Americans would receive health care.

Explanation:

The two factors that led to the passage of Medicare and Medicaid were:

the answer to your question is: family members who abuse drugs.

(i hope this ! )